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An aircraft`s weak VHF radio is replaced with one producing three times the original radio`s transmission power. How is this likely to affect the maximum range at which its transmissions can be received, assuming line of sight is maintained? Transmissions should be receivable at a distance approximately..
  • A
    9 times the original range.
  • B
    1.7 times the original range.
  • C
    1.3 times the original range.
  • D
    3 times the original range.

Range is proportional to the square root of the power output:

  • Range [NM] = √power [W]

Tripling the power output will result in a square root of three (√3) increase in the range = increase by 1.7 when the power output is tripled.

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